Biology (Medical Entrance)

Vesicular-arbuscular mycorrhiza (VAM) are symbiotic fungi that significantly enhance the uptake of phosphorus by plant roots.

Hexaploid wheat (Triticum aestivum) evolved through hybridization involving Aegilops squarrosa (also known as Triticum tauschii) as the D-genome donor.

Shoot apical meristems are often free of viruses even in infected plants because the virus cannot keep pace with the rapid cell division in the meristematic tissue.

Solanum acaule is a wild potato species known to carry resistance genes against various potato viruses, including potato virus X.

Jute fibers are obtained from the stems of plants in the genus Corchorus, specifically Corchorus capsularis and Corchorus olitorius.

Shoot tip cultures are preferred because they allow for both easy regeneration and the production of virus-free plants, making them ideal for germplasm exchange.

The first successful production of haploid plants via anther culture was reported by Guha and Maheshwari in 1964 using Datura innoxia.

Recalcitrant seeds are those that cannot withstand drying or freezing, unlike orthodox seeds which can be dried and stored at low temperatures.

Selman Waksman coined the term 'antibiotic' in 1947 to describe substances produced by microorganisms that inhibit other microorganisms. Note: The name is misspelled as 'Walksman' in the option - it should be 'Waksman'. Louis Pasteur discovered germ theory, Babes worked on pathogens, and Woodruff discovered antimicrobials but didn't coin the term.

Embryo rescue is a technique used to save hybrid embryos that would otherwise abort due to endosperm failure. It is widely used in crops like Oryza, Corchorus, and Lycopersicum, but it is not a standard or necessary technique for Zea mays hybridization.

Eleusine coracana, commonly known as finger millet or ragi, is a widely cultivated cereal crop classified as a millet. Zea mays is maize, Secale cereale is rye, and Trifolium alexandrium is a clover.

High-quality fuel wood should have high calorific value, low moisture content, and burn steadily without excessive sparking or splitting. Option D describes the ideal characteristics for efficient combustion.

Pinus species are well known for the production of resin and turpentine. The other listed genera are not primary commercial sources of resin.

Commercial cork is harvested from the bark of the cork oak tree, Quercus suber. It is a renewable resource as the bark regenerates after stripping.

Androgenic haploids are produced via anther or pollen culture. They are highly valuable in breeding because they can be doubled to create homozygous lines, are useful for mutation studies, and reveal recessive traits.

Compost is produced by the decomposition of organic matter, which includes cattle dung, animal excreta, and plant waste like rotten vegetables.

Ricinus communis (castor) produces oil that is primarily used for industrial purposes, such as lubricants and paints, and is considered non-edible due to the presence of ricin.

Phytophthora palmivora is a fungus used as a mycoherbicide to control specific weeds. 2-4 D is a synthetic chemical herbicide, not a bioherbicide.

The Para rubber tree (Hevea brasiliensis) is native to the Amazon rainforest in Brazil.

Triticale is a man-made hybrid created by crossing wheat (Triticum) and rye (Secale). It is an allopolyploid (specifically an allotetraploid or allohexaploid depending on the cross).